Painter&#39;s scaffold



A. DAMORE mmwns SCAFFOLD Filed Dec, '30, 1925 s Sheets-Sheet 1 gwuentot (haw/2103127220219,

Patented Sept. 13, 1927.

fuNv-ii'rsn STATES 1,642,333 :RATENT D'FFiCI-L.

ANTONIO unions, or "new Yonx,

rnmrmvs scum (Application fflled December My invention relates to scafi'olds of the :elevatingyplatform type employed bypainters ii or work on the exterior of buildings. Amongthe principal objects which thepreswe cut invention has in 'view' are: the provision of a portable elevating scaiiold structure; the provision in such a structure of novel platform supporting and operating means; the provision in a scafiold of this character no of novel means for :moving a suspended "platform horizontally alonga building "wall; zthe provision in a-sc'aflold of this character of a novel platform carrier and ltrackway therefon; and the provision of a safety stop iforithecarrier. 5

\Vith'these and such-other objectsin view as will be apparent from the description,- my invention resides in thevnovel combination constructionand arrangement of parts here- '5) ina'fter described :and claimed, and illustrated :in Ith'e V: accompanying drawings wherein Figure 1 is a fragmentary elevation of-the -tp ofa building wall illustrating the scaffold .as applied thereto; 1 viFigvure isaa top vplan'viewof a modified iform of "trackway and the: carrier;

Figure 3 is an "end elevation of the scaffold as-shown in Figure 1;. V V

Figure i4 is a top plan View aof the op- :erators platform;

Figure 5 is a verticaltransversersection therethrough; i I

Figure 6 is yertical-central section through the platform carrier and .tmckwa'y; 'Figure 7 is a horizontal section on the line 7-7 0f Figure '6'; i 2 F igure 8 is a fragmentary end plan of the j modi fied form of trackwaysection OfiFlgVQ;

Figu're i)is atop plan view 'of a modified form otf trac'kway section employed ifor buildings of bowed wall I construction.

'Th'e scafi'old is shown as 'applied'to :the wall of a building 10, from the roof cornice "11 of which it is suspended -jby'means of a plurality of substantiallyarched brackets 12, each of which has a vertical leg '13 provided -\Vlifl1 angled feet 14 for disposition over the top ancle-dge of the roof'cornice as best @shownin Figure 3. In service,'the brackets 12 are securely fastened tot-the roofing structure 'by means of anchor ropes 15 attached t0 the legs' lb and tied toa' suitable rooffixture '(not shown) The outer leg" 1610f each I roof bracket extends downwardly in 30, M25; W30. 1mm.

spaeednelation :from the leg :13, having its lower end passed through and riveted;to-..the bottom of a troughshaped track :section 111, the upstanding side flanges of which provide lIQilS "18 if or the double :flanged wheels :00 ,19 i of :a learner to :be subsequently described. The trackway :is imade zup in the desired lengths ifrmma plurality of the sections 17 joined in end itoendrelationlbymeans-of fish plates 20;.disposedu1ider the meeting 06 tends of the :sections and :attached to the irespeetive ends a by :means idf bolts, 21. When thesscaifold isten ployed-on buildings having bay windows and "the dike, track sections :suches illustrated in Figure 9l-are utilized at .the -desired points. These sections are formed with straight ends22 and-@outwardly bowediintermediate:portionsQB. I s I I The murder (for-the openators I seat or movable :platform aQOHSiStS \of ifi fmme "made up of a pair of metal end straps 24 extending :tmnsvnrsely between the :lower ends I of upmightarms 25 eperpendicular thereto and integral therewith; :the straps being connected tbyia flatmetalbrace abar 26-disposed in the ilongitudinabxmter of-the frame and secured at vits ends by ofithe iholts :27 passed through the Land stna s. .Eachof the zframe mzms $25 marries a jacentlits upper end :an'asxle :hdlt 28 over" which are journa'lled \the spacer :sleeves z29 and canrier wheels the wheels :engaging the trackway :rai-ls 1:8 'to suspend the caa'rier there- -f-rom. The inner side ofmhe carrier eframe consists a :side :bar 30 extending ilongiitudinally 0f the frame and connected to athe inner :arms :25 intermediate :their ends "by fastening bolts 31. Thebar 30 .isimmed with light angled rend :portions 32 extending for :a vslight ='distanee transversely of the frame and terminatingiinr-extensions-13?) pro jecting rbeynnd each rend the Theme and llnngi'tadinalliy thereof. "On 'its outer: sidezthe carrier ifmme provided with a .side bar disposed :purallel to and in horizontal sflignment vxiizthitlrewhar '30:and connected to 1-;he-:e1mer EHI'IIIS 25 :by bolts 35. The char :34 aistform'ed with :right :angle'diend :po'r- :tion's 216-.isxtend-ingfforIa"slight distance transwersely -0f the :frame .and terminating 'in "PBIEM :aspaced extensions 37 projecting be- *yond eech en'd oftheiframeand longitudnral- 1y thereof. Plilleys 38 are :jou'rn-alled "between the extens'ions37.

The upper ends of -eah side pair 'of the mo beneath.

frame arms 25 are connected longitudinally of the frame by webs 39 formed integral with the arms so that the arms, webs and straps 24 are an integral unit. Intermediate the arms 25 the webs 39 have attached thereto depending straps 40 formed with inturned fingers 41 which reach from opposite sides of the carrier frame beneath the track 1'? forming guards to prevent unseating of the wheels 19.

Secured at its upper end by a nut 42 resting on a bearing formed by the bar 26 of the carrier frame, is the shackle bolt 43 of a pulley block 44 suspended beneath the carrier intermediate the ends thereof. A tackle cable 45 connects the block 44 with a lower pulley block 46 which is in turn connected through a ring bolt 47 with the top how 48 of an operators chair or platform 49 consisting of a seat 50 and side pieces 51 connected by rungs 52 with the top side bars 58 and back 54, all of which are securely braced by metal loop straps 55 bound over the ends of the chair. The depending ends 56 of the top bow48 are rigidly attached to the top side pieces 53 and bottom side pieces 51. A shelf 57 at the rear of the chair provides a receptacle for pots and brushes. If desired, the shelf 57 may be extended to form the'seat, providing a receptacle there- Spacer rods 58 provided at their free ends with conventional swivelled casters 59 adapted to bearv against the building wall, are slidably housed in casings 60 carried by the bottom side pieces of the chair. Set screws 61 extending through the casing walls cooperate with the spacer rods to pro vide a means for adjusting the spacing of the chair away from the building wall.

The chair 49 is raised or lowered by means of the pull rope 62'of the tackle cable 45, while the chair and carrier are moved longitudinally along the trackway by manipulation of either of the side cables 63 or 64. These cables 63 and 64 are guided over the sides of the chair through the eye bolts 65 and 66 fastened in the side pieces 51. The cable 63 is passed over the carrier pulley 38 at one end thereof and continued over a pulley 67 horizontally disposed in a casing 68 secured rigidly-to the trackway beneath one end, from which the cable passes to an attachment with the adjacent end extension33 of the carrier frame. The cable 64 passes over the other carrier'pulley 38 and over a pulley 69 horizontally carried in a casing 70 secured under'the opposite end of the trackway, after which it passes to an attachment to the other of the carrier end extensions 38. It will be apparent that upon pulling either of the cables 63 or 64, while the other runs free, the carrier and suspend ed chair may be moved along the trackway across the face of the building wall as desired, the proper elevation having been secured by the elevating block and tackle. The three cables 62, 63 and 64 may be secured in any suitable manner beneath the chair, forming a three point suspension therefor, insuring again-st dropping of the chair if one of the cables should break.

The pulley casings 68 and 70 are rigidly attached under the opposite ends of the trackway where they project into the path of travel of the carrier providing solid stops against which the carrier pulleys strike to arrest the carrier at the limits of its travel. in the structural arrangement shown in Figure 1 the pulley casings are disposed longitudinally of the trackway, and the carrier stoppage will be to a certain degree abrupt. If pronounced, such an abrupt stoppage may have detrimental effects, such as snapping the cable or overturning paint pots. l have overcome this possibility by providing the modification illustrated in Figures 8 and 2 wherein an end pulley 71 is mounted in a casing 7 2 whichextends laterally outward of the trackway 17. With this construction the carrier moving cable, such as 63, will be angled considerably outward from the trackway end, and as the carrier is securely retained on the trackway, the carrier will be brought-to a gradual, yielding stop at the trackway end due to the binding action of the cable and its inherent tensile strength.

While in this embodiment of the invention I have illustrated and described cer-' tain details entering into the construction and operation thereof, I desire it to be understood that the invention is not to be limited thereby but that any desired changes and modifications may be made in the structural details as will fall within the Scope 0 the invention as claimed.

I claim '1. A scaffold comprising a trackway, means for attaching said trackway to a roof structure, a wheeled carrier movable over said trackway, a support suspended from said carrier, a cable associated with said support and attached to said carrier for moving said carrier along the trackway, and a plural element yielding bufier mechanism, one of said elements comprising said carrier attached cable, and another of said elements being secured to said trackway.

2. In a scaffold thecombination with a roof attachable trackway, of a carrier comprising a frame having upright side arms, trackway engaging wheels journalled in the upper ends of said arms, side webs connecting the ends of said arms at the top of the frame, derailing guards disposed on said webs and under the trackway, bottom straps connecting the lower ends of said arms transversely of the frame, a brace bar connecting said straps longitudinally of the frame, a support suspended from said brace bar, and means for moving said carrier along the trackway.

3. In a scaffold the combination with a roof attachable trackway, of a carrier comprising a frame having substantially 'U shaped end members, side webs integrally connecting the upper ends of said members, trackway engaging wheels journalled in said members, side bars connecting said end members intermediate their ends, end extensions formed on said side bars and projecting beyond the frame ends, a bottom brace bar connecting said end members, a support suspended from said brace bar, and means associated with said support and in operative connection with said end extensions for moving said carrier along the trackway.

4. In a scaffold the combination with a trackway, of a carrier comprising a frame having substantially U shaped end straps integrally connected at their opposite ends by side webs of a width greater than that of said straps, trackway engaging wheels journalled in the ends of said straps, horizontally aligned parallel side bars connecting said straps in spaced relation below said webs, end extensions formed on said side bars and disposed directly under the trackway beyond the frame ends, a bottom brace bar connecting the bottoms of said end straps longitudinally of the frame, a sup 'ort suspended from said bottom brace ar, and means associated with said support and in operative connection with said end extensions for moving said carrier along the trackway.

V 5. In a scafiold, a trackway, means for attaching said trackway to a roof structure, a wheeled carrier movable over said trackway, a support suspended from said carrier, a cable aving one terminal associated with said support and arranged for moving said carrier along the trackway, and a pulley for said cable carried by said trackway in such manner as to dispose a portion of said cable as a yieldable check on movement of said carrier past a predetermined point.

In testimony whereof I have afiixed my signature. 

